Question

Cystic fibrosis is a disorder that causes the mucus glands to produce very thick mucus. Problems with the respiratory and digestive systems often occur in individuals with this condition. Like many disorders, cystic fibrosis occurs when there is a simple change, or mutation, in the DNA of a particular gene.

According to the information above, genetic mutations
A.
will always cause death in humans.
B.
usually result in the release of excess mucus.
C.
can contribute to or cause diseases in humans.
D.
can only cause diseases in plants and wild animals.

Answer 1

C. Mutations can contribute to or cause diseases in humans.

Explanation: The passage states cystic fibrosis is caused by a DNA mutation, showing that genetic mutations can lead to human diseases (they do not always cause death, are not limited to mucus overproduction, and do not only affect plants/animals).